Please help with this for my study guide for my UNIX test

Input/Output redirection - Understand what is meant by: - standard input - standard output - standard error - Know how to use these symbols in unix commands: 0 0> 0 | - Specifically, know how to: - Re-direct standard input into a command to come from a file - Re-direct the standard output from a command to go to a file (instead of the screen) - Re-direct the standard output from a command to be appended to a file - "Pipe" the output from one command to become the input to another command